fixed GitLab build (#18144)

Author: schmunk42

.gitlab-ci.yml

@@ -9,8 +9,7 @@ variables:
   DOCKER_POSTGRES_IMAGE: postgres:9.3
 
 before_script:
-  - apk add --no-cache python py2-pip git
-  - pip install --no-cache-dir docker-compose==1.16.0
+  - apk add --no-cache git curl docker-compose
   - docker info
   - cd tests